Process for preparing chlorinated diphenyl ethers
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United States of America Patent
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Aug 23, 1988
Grant Date -
N/A
app pub date -
May 4, 1987
filing date -
May 4, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a novel process for preparing chlorodiphenyl ethers of the formula I ##STR1## in which R is hydrogen or chlorine, which comprises heating a material of the formula III ##STR2## in which X is one equivalent of an alkali metal or alkaline earth metal ion and R is as defined above, in an excess of a dichlorobenzene of the formula II ##STR3## in the presence of a copper catalyst and of an aprotic solvent as cocatalyst at temperatures of 120.degree.-220.degree. C.
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